Park C.-S.,Sangmyung University
IEEE Transactions on Signal Processing | Year: 2014
In this paper, a recursive sliding transform (RST) algorithm is proposed for the fast implementation of the Walsh Hadamard Transform (WHT) on sliding windows. The proposed RST algorithm accelerates the sliding WHT process by recursively reducing the order of WHT. Theoretical analysis shows that the proposed RST algorithm requires only 1.33 additions per sample for each WHT basis vector regardless of the size or dimension of the basis vector. The computational requirement of the proposed RST algorithm is the lowest among existing fast sliding WHT algorithms. © 1991-2012 IEEE.
Yoo H.,Sangmyung University
Optics Express | Year: 2013
This paper presents a new high-resolution computational integral imaging system employing a pickup with the axial movement of a lenslet array and a computation reconstruction algorithm with pixel-to-pixel mapping. In the proposed method, a lenslet array and its image sensor are moved together along the z-axis direction (or axial direction) and a series of elemental image arrays are obtained while moving. The elemental image arrays are then applied to pixel-to-pixel mapping without interpolation for the reconstruction of 3D slice images. Also, an analysis of the proposed reconstruction method is provided. To show the usefulness of the proposed method, experiments are conducted. The results indicate that the proposed method is superior to the existing method such as MALT in terms of image quality. © 2013 Optical Society of America.
Jung H.,Sangmyung University
Expert Systems with Applications | Year: 2011
Most manufacturing companies cooperate with manufacturing partners in order to have flexible usable capacities to meet variable customer demand. In this environment, evaluations of manufacturing partners and integrated production-planning have become a critical issue. For integrated production-planning for all local manufacturing sites and manufacturing partners, the company should first evaluate the manufacturing partner, and then should decide how to allocate the production quota among internal facilities and manufacturing partners. In this paper, we propose a fuzzy analytic hierarchy process (AHP)-goal programming (GP) approach to solve this integrated production-planning problem. The fuzzy AHP is utilized to determine relative weights of manufacturing partners, while the GP is used to formulate the integrated production-planning problem. The proposed approach is illustrated by an example adopted from a TFT-LCD manufacturing firm. © 2010 Elsevier Ltd. All rights reserved.
Hwang J.Y.,Sangmyung University
Journal of the American College of Nutrition | Year: 2013
The SNP276G>T polymorphism in the adiponectin gene has been reported to be associated with type 2 diabetes and impaired glucose tolerance. The objective of this study was to examine whether SNP276G>T polymorphism influences the blood glucose levels in relation to dietary carbohydrate intake. In an ongoing, prospective study, 673 patients with type 2 diabetes (339 men and 334 women, aged 40-85 years) were recruited from one of two diabetes clinics in Seoul, Korea. The levels of carbohydrate intake were categorized as <55%, 55%-65%, and >65% of total energy intake. Significant gene-nutrient interactions between SNP276G>T polymorphism and the level of carbohydrate intake were found, which modulated plasma fasting blood glucose (p=0.0277), HbA1C (p=0.0407), and high-density lipoprotein (HDL) cholesterol (p=0.0134) concentrations. The G allele was associated with higher fasting blood glucose only in subjects consuming a low-carbohydrate diet (<55% of energy). However, when carbohydrate intake was intermediate (55%-65%), carriers of the T allele had greater fasting blood glucose and HbA1C concentrations. When carbohydrate intake was high (>65%), carriers of the T allele had greater HDL cholesterol concentrations. This interaction was significant even when carbohydrate intake was considered a continuous variable (p=0.0200 for fasting blood glucose, p=0.0408 for HbA1C, and p=0.0254 for HDL cholesterol), suggesting a strong dose-response relation. Our data show that the effect of the SNP276G>T polymorphism on plasma fasting blood glucose, HbA1C, and HDL cholesterol concentrations depends on dietary carbohydrate intake.
Park J.,Sangmyung University
Design Studies | Year: 2011
This project developed the next generation information appliances by user-centered design, acquired and stored the knowledge which designers used in the design process, and developed a knowledge management system for supporting the knowledge users to develop their own product ideas. It applied a scenario-based design and an ethnographic study as methods for user-centered design in to developing new product ideas required by the users. It stored the designer's knowledge in knowledge bases and linked the knowledge connected in the design process to show where it came from. The links help the knowledge users trace the design process, get the design knowledge, and develop their own product ideas. This will make the results from this project facilitate the development of the next generation information appliances. © 2011 Elsevier Ltd. All rights reserved.